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Cogent Communications to Host Fiscal Year 2017 Earnings Call on February 22, 2018

WASHINGTON, D.C. February 1, 2018 – Cogent Communications Holdings, Inc. (NASDAQ: CCOI) will host a conference call with financial analysts at 8:30 a.m. (ET) on February 22, 2018 to discuss Cogent’s operating results for the fourth quarter and full year of 2017. Cogent will issue a press release announcing the operating results at 7:00 a.m. (ET) on February 22, 2018.

To participate, investors and other interested parties may access the earnings call as follows:

Dial-in Numbers: 1-800-668-4132 for U.S. callers and 1-224-357-2196 for international callers

Internet: An audio webcast is accessible under "Events" in the "News" section of Cogent's website at www.cogentco.com/events and will remain available through May 23, 2018.

Since its inception, Cogent has unleashed the benefits of IP technology, building one of the largest and highest capacity IP networks in the world. This network enables Cogent to offer large bandwidth connections at highly competitive prices. Cogent also offers superior customer support by virtue of its end-to-end control of service delivery and network monitoring.

Cogent Communications is headquartered at 2450 N Street, NW, Washington, D.C. 20037. For more information, visit www.cogentco.com. Cogent Communications can be reached in the United States at (202) 295-4200 or via email at This email address is being protected from spambots. You need JavaScript enabled to view it..

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Information in this release may involve expectations, beliefs, plans, intentions or strategies regarding the future. These forward-looking statements involve risks and uncertainties. All forward-looking statements included in this release are based upon information available to Cogent Communications Holdings, Inc. as of the date of the release, and we assume no obligation to update any such forward-looking statement. The statements in this release are not guarantees of future performance and actual results could differ materially from our current expectations. Numerous factors could cause or contribute to such differences. Some of the factors and risks ass3ociated with our business are discussed in Cogent's registration statements filed with the Securities and Exchange Commission and in its other reports filed from time to time with the SEC.

Cogent is one of the world's largest Internet Service Providers, delivering high quality Internet, Ethernet and Colocation services to over 84,000 Enterprise and NetCentric customers. Cogent serves over 204 markets in 43 countries across its facilities-based, all-optical IP network.